Ergonomic two-thumb keyboard



FIG. 1 is an isometric view of a ergonomic two-thumb keyboard constructed in accordance with the invention showing the left and right thumb keyboards;

FIG. 2 is a bottom isometric view of the ergonomic two-thumb keyboard of FIG. 1 showing the keys arranged for use by the first and second digits of the left and right hands for data entry;

FIG. 3 is a top view of the ergonomic two-thumb keyboard of FIG. 1 and FIG. 2 showing the keys of the device arranged for use by the left and right thumbs for data entry;

FIG. 4 is a bottom view of the ergonomic two-thumb keyboard of FIG. 1 and FIG. 2 showing the keys arranged for use by the first and second digits of the left and right hands for data entry;

FIG. 5 is a top end view of the ergonomic two-thumb keyboard showing a section of the housing of the data entry device of FIG. 1 and FIG. 2;

FIG. 6 is a left side view of the ergonomic two-thumb keyboard showing a section of the housing of the data entry device of FIG. 1 and FIG. 2;

FIG. 7 is a right side view of the ergonomic two-thumb keyboard showing a section of the housing of the data entry device of FIG. 1 and FIG. 2; and,

FIG. 8 is a bottom end view of the ergonomic two-thumb keyboard showing a section of the housing of the data entry device of FIG. 1 and FIG. 2. 

The ornamental design for a ergonomic two-thumb keyboard, as shown and described. 